6.(q^9)^2

A. 2q^18
B. q^18
C. q^81
D.q^11

7.(6q^6)^-4

A. 6q^1296
B. 1296q^2
C. 1/1296q^24
D. 6q^-24

8. What is the value of 12x^-3 y^-1 for x = -1 and y = 5?

A. -12/5
B.-10
C.-0
D.5/12